太原理工大学学报2017，Vol.48Issue(3)：407-412,6.DOI:10.16355/j.cnki.issn1007-9432tyut.2017.03.019
酸液对煌斑岩抗拉力学性能的影响及机理分析
The Influence of and Mechanism Study Tensile Mechanical Properties of Lamprophyre in Acid Condition
摘要
Abstract
Owing to the invasion of stratiform lamprophyre in 3-5 # coal in Datong mining area Tashan mining which forms the hard roof,initial caving step distance of roof becomes bigger and the probability of rock-burst accident becomes higher.According to the component analysis results,there is a high content of carbonate in lamprophyre.The method for softening lamprophyre is an effective cure to this accident.The sofcening experiment,which is based on the high carbouate contant of lamprophyce,has been designed,including observation of reaction macrophenomena,strength deterioration,elasticity modulus deterioration and scanning electron microscopy tests before and after steeped in the acid solution.The results show that:The small holes can be seen by naked eyes in the surface of lamprophyre specimens.The tensile strength of the samples decreases after steeped in acid solution.And the biggest strength deterioration is 42.29％.The strength deterioration is bigger while the pH of solution is smaller.The biggest elasticity modulus deterioration is 39.69％,which means the resistance capacity to deformation of lamprophyre after steeped in solution is weaker than that in natural state.In micro perspective,the essence of strength reduction owes to the increase of pore inside the rock specimen.The specimens is easily destroyed when the specimens are pressed becouse of the weak surface.关键词
煌斑岩/遇酸软化/抗拉强度损伤/扫描电镜Key words
lamprophyre/softening by hydrochloric acid/strength deterioration/scanning electron microscopy tests分类
矿业与冶金引用本文复制引用
申辰,冯国瑞,郭军,王家臣,戚庭野,李振,杜献杰,康立勋..酸液对煌斑岩抗拉力学性能的影响及机理分析[J].太原理工大学学报,2017,48(3):407-412,6.基金项目
国家自然科学基金优秀青年科学基金资助项目(51422404) （51422404）
国家自然科学基金面上项目(51174142,51574172) （51174142,51574172）
山西省人才专项(优秀人才科技创新项目) （优秀人才科技创新项目）
